EVOLUTION OF THE SPIN OF THE NUCLEON

Citation
Pj. Mulders et Sj. Pollock, EVOLUTION OF THE SPIN OF THE NUCLEON, Nuclear physics. A, 588(4), 1995, pp. 876-888
Citations number
43
Categorie Soggetti
Physics, Nuclear
Journal title
ISSN journal
03759474
Volume
588
Issue
4
Year of publication
1995
Pages
876 - 888
Database
ISI
SICI code
0375-9474(1995)588:4<876:EOTSOT>2.0.ZU;2-C
Abstract
We compare momentum sum rules from unpolarized electroproduction and t he spin sum rule for g1 in polarized electroproduction, and their Q(2) evolution in the framework of the operator product expansion. Second order effects in alpha(s) are included. We show that in comparing the evolution of the spin sum rule with the momentum sum rule one is not o verly sensitive to using first or second order, even when going to the extreme low Q(2) limit in which gluons carry no momentum. Our results show that in that limit there is no need to include any contribution of strange quarks.